[1] No universal insignia for officer candidate rank; Navy candidate insignia shown[2]Official 1945 proposal for General of the Armies insignia; John J. Pershing's GAS insignia: ; George Dewey's Admiral of the Navy insignia: [3] Rank used for specific officers in wartime only, not permanent addition to rank structure [4] Grade is authorized by the U.S. Code for use but has not been created[5] Grade has never been created or authorized[6] USAF and U.S. Army insignia shown